Growth and properties of ZnO nanorods by RF-sputtering for detection of toxic gases

Abstract

ZnO polycrystalline nanorods were easily prepared via RF sputtering and proved excellent sensors for H2S and other toxic/explosive gases.

Vertically Coupling ZnO Nanorods onto MoS2 Flakes for Optical Gas Sensing

“…Competing techniques for ZnO NW growth include hydrothermal deposition, which involves water solution chemistry and is, therefore, less industrially scalable. We proved already that it is possible to deposit ZnO nanorods by RF sputtering, starting from Sn seeds at 400 • C [34]; deposition at a lower temperature was obtained starting from Cu rough layer [38], but involved a complex procedure for reaching proper Cu roughness. Physical deposition techniques, like growth by evaporation in furnaces, are not feasible due to the high-temperature process (600 • C) [39].…”

“…Many approaches have been proposed to couple 2D MoS 2 to 1D ZnO, leading to fascinating fundamental phenomena and advanced devices: the objective of this contribution is to study the PL optical properties for chemical sensing of a hybrid structure obtained by depositing ZnO nanorods through magnetron sputtering [34] on exfoliated MoS 2 flakes, a process never yet carried out to the best of our knowledge.…”

“…• C[34] may be ascribable to a lower degree of crystallinity produced by the deposition temperature of 200 • C, a trade-off to avoid damage of MoS 2 during the ZnO deposition.…”

Recent Progress on Fabrication of Zinc Oxide Nanorod-based Field Effect Transistor Biosensors

“…Various ZnO nanostructures also has been obtained by hydrothermal method, as shown in Figure 2. Meanwhile, Baratto (2018) was successfully deposited ZnO nanorod by RF magnetron sputtering method. In addition, four kinds of ZnO nanostructures, nanorods, nanopencils, nanotowers and nanoneedles have been successfully deposited using CVD by manipulating the growth parameters (He et al 2018).…”

“…Many studies on biosensors has utilizing on different morphologies of ZnO nanostructures, such as nanoparticles (Mahmoud et al 2019;Medawar-Aguilar et al 2019), nanofilms (Agarwal et al 2019;Zhai et al Zinc oxide (ZnO) is an attractive biomaterial for its versatile properties such as semiconducting (wide bandgap of 3.37 eV), bio-safe and biocompatible with high isoelectric point of ~9.5. ZnO nanostructures can be prepared using various methods such as spin-coating (Bangbai et al 2013;Mahmood et al 2019), hydrothermal Zhang et al 2019), spray pyrolysis (Dedova et al 2019), radio frequency (RF) magnetron sputtering (Baratto 2018;Ching et al 2014), chemical (Saranya et al 2017;, nanosheets (Ahmad et al 2015) and nanorods (Baratto et al 2018;Fathollahzadeh et al 2018;Mahmood et al 2019) 2019), nanosheets (Yue et al 2019a), nanoflowers (Yue et al 2019b), nanorods (Ahmad et al 2017;Ridhuan et al 2018;Singh et al 2019a) and nanowires (Ditshego 2018). For instance, ZnO nanosheets has been utilized for biosensing matrix to detect uric acid (Ahmad et al 2015a).…”